The Egyptians began baking bread as early as 2600-2100 BC after learning the skill from the Babylonians. During the Roman Empire, Greek baking knowledge was transformed and flourished, with evidence of the first pastry-cook's association emerging in the 4th century AD. Today, baking involves precisely measuring ingredients like flour, water, yeast, and sugar before applying heat in an oven, resulting in foods with reduced moisture that don't spoil easily and have an attractive golden-brown color.